// Mock execution
            }
        };

        // Mock ComponentUtil
        ComponentUtil.setFessConfig(new TestFessConfig() {
            @Override
            public Integer getJobMaxCrawlerProcessesAsInteger() {
                return 5;
            }
        });

        ComponentUtil.register(new KeyMatchHelper() {
            @Override
            public void update() {

        assertEquals("jpg,jpeg,gif,png", fessConfig.getAppExtensionNames());
    }

    public void test_jobMaxCrawlerProcesses() {
        assertEquals(Integer.valueOf(3), fessConfig.getJobMaxCrawlerProcessesAsInteger());
    }

    public void test_maxLogOutputLength() {
        assertEquals(Integer.valueOf(4000), fessConfig.getMaxLogOutputLengthAsInteger());
    }

    // Test index field configurations

        return this;
    }

    @Override
    public String execute() {
        //   check # of crawler processes
        final int maxCrawlerProcesses = ComponentUtil.getFessConfig().getJobMaxCrawlerProcessesAsInteger();
        if (maxCrawlerProcesses > 0) {
            final int runningJobCount = getRunningJobCount();
            if (runningJobCount > maxCrawlerProcesses) {
                throw new JobProcessingException(